102 research outputs found
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Region aware DCT domain invisible robust blind watermarking for color images.
The multimedia revolution has made a strong impact on our society. The explosive growth of the Internet, the access to this digital information generates new opportunities and challenges. The ease of editing and duplication in digital domain created the concern of copyright protection for content providers. Various schemes to embed secondary data in the digital media are investigated to preserve copyright and to discourage unauthorized duplication: where digital watermarking is a viable solution. This thesis proposes a novel invisible watermarking scheme: a discrete cosine transform (DCT) domain based watermark embedding and blind extraction algorithm for copyright protection of the color images. Testing of the proposed watermarking scheme's robustness and security via different benchmarks proves its resilience to digital attacks. The detectors response, PSNR and RMSE results show that our algorithm has a better security performance than most of the existing algorithms
Digital Image Watermarking in Wavelet Domain
Internet allows individuals to share the information. The shared information is like text, image, audio and video files. This information sharing results in some problems such as copyright violation, unauthorized use of documents. Such problems can be solved by using a technique called as digital watermarking. This paper presents different aspects of watermarking and how it is useful for intellectual property protection on internet.DOI:http://dx.doi.org/10.11591/ijece.v3i1.174
A Comprehensive Review on Digital Image Watermarking
The advent of the Internet led to the easy availability of digital data like
images, audio, and video. Easy access to multimedia gives rise to the issues
such as content authentication, security, copyright protection, and ownership
identification. Here, we discuss the concept of digital image watermarking with
a focus on the technique used in image watermark embedding and extraction of
the watermark. The detailed classification along with the basic
characteristics, namely visual imperceptibility, robustness, capacity, security
of digital watermarking is also presented in this work. Further, we have also
discussed the recent application areas of digital watermarking such as
healthcare, remote education, electronic voting systems, and the military. The
robustness is evaluated by examining the effect of image processing attacks on
the signed content and the watermark recoverability. The authors believe that
the comprehensive survey presented in this paper will help the new researchers
to gather knowledge in this domain. Further, the comparative analysis can
enkindle ideas to improve upon the already mentioned techniques
Copyright protection of scalar and multimedia sensor network data using digital watermarking
This thesis records the research on watermarking techniques to address the issue of copyright protection of the scalar data in WSNs and image data in WMSNs, in order to ensure that the proprietary information remains safe between the sensor nodes in both. The first objective is to develop LKR watermarking technique for the copyright protection of scalar data in WSNs. The second objective is to develop GPKR watermarking technique for copyright protection of image data in WMSN
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